WHILE DRIVING ON HIGHWAY I NOTICED A SMELL OF BURNING MATTER RAPIDLY INCREASING IN THE CAR, IMMEDIATELY FOLLOWED BY A SHARP BURNING SENSATION IN MY RIGHT THIGH. WHILE HALF-STANDING I WAS ABLE TO MANEUVER MY CAR TO THE HIGHWAY SHOULDER. (WHICH WAS VERY DIFFICULT TO DO SAFELY, GIVEN THE TRAFFIC WAS DENSE AND MOVING WITH HIGHWAY SPEEDS.) AFTER I PULLED OVER, TURNED OFF THE CAR, CAME OUT OF THE VEHICLE AND LOOKED AT THE SEAT, I NOTICED A BURN MARK ON THE LEATHER, EXACTLY WHERE MY THIGH WAS WHEN IT GOT BURNED. IT SEEMED THAT THE SEAT WARMER OVERHEATED AND BURNED A HOLE IN THE LEATHER. I VENTILATED THE CAR FROM THE BURNING ODOR, WHICH GAVE ENOUGH TIME FOR THE SEAT TO COOL DOWN. AFTER GETTING TO A SAFER LOCATION I TESTED MY THEORY BY TURNING ON THE SEAT WARMER ? THE ISSUES WAS REPRODUCIBLE. I WENT TO STEVENS CREEK BMW DEALERSHIP FOR DIAGNOSTICS AND REPAIRS. THEY CHARGED ME $210.88 DIAGNOSTIC FEE AND QUOTED WITH AROUND $1,500 FOR THE REPAIRS, IMPLYING THAT THEY WILL NOT FIX THIS ISSUE AS ?A GOOD WILL? SINCE MY CAR IS TOO OLD AND HAS TOO MANY MILES ON IT AND THAT IT HAS NONE OF THE WARRANTIES LEFT. I STILL THINK THEY SHOULD HAVE FIXED IT AS "A GOOD WILL" SINCE THE DEALERSHIP DIAGNOSED A SHORT CIRCUIT IN THE SEAT WARMER. THE SEAT WARMER SHOULD HAVE FAILED IN A FAIL-SAFE WAY BY NOT WARMING OR AT LEAST BLOWING A FUSE (AND AGE & MILES HAVE LITTLE TO DO WITH POOR ENGINEERING). *TR